I was referring to the BGP route selection rules. But as someone else pointed out, there are things like local pref that they can use, which falls within those rules…
From: AusNOG [mailto:[email protected]] On Behalf Of McDonald Richards Sent: Friday, 12 January 2018 9:14 AM To: [email protected] Subject: Re: [AusNOG] Megaport IX Sydney - Sudden grows in number of prefixes Pretty sure there are no rules.... On Fri, Jan 12, 2018 at 9:08 AM, Philip Loenneker <[email protected]<mailto:[email protected]>> wrote: Traffic engineering is difficult when people don’t play by the rules… Perhaps using the HE community strings which Jacob suggested would be more helpful – you may be able to prevent HE advertising your subnets to TPG. Unless NSW-IX remove all community strings when they go to peers…. From: AusNOG [mailto:[email protected]<mailto:[email protected]>] On Behalf Of John Alexander Sent: Friday, 12 January 2018 9:04 AM To: [email protected]<mailto:[email protected]> Subject: Re: [AusNOG] Megaport IX Sydney - Sudden grows in number of prefixes I tried this, with 3:6939 which added 3 prepends to he (which I could see at HE's LG) but TPG still preferred to send traffic via he rather than transit, even though the path was longer... ughhh On 01/12/2018 08:52 AM, Philip Loenneker wrote: Note that you can also use BGP communities to adjust how the IX advertises your subnets to individual peers using the documentation here: https://www.ix.asn.au/peering-technical/ Unfortunately you can't set a community of 0:7545 to avoid advertising your routes to TPG, as they aren't the direct peer - you would need to block advertising to HE using 0:6427. It may be sufficient for you to prepend the routes being advertised to HE, using 3:6427, to reduce the amount of traffic taking that path, but still keeping it available. -----Original Message----- From: AusNOG [mailto:[email protected]] On Behalf Of Bill Walker Sent: Friday, 12 January 2018 8:11 AM To: John Alexander <[email protected]><mailto:[email protected]> Cc: [email protected]<mailto:[email protected]> Subject: Re: [AusNOG] Megaport IX Sydney - Sudden grows in number of prefixes Filter based on the AS Path? If the path is: You <- 58941 <- 6427 <- 7545 You <- MegaIXSyd <- HE <- TPG In the Cisco world, I would use ip as-path access-list 10 deny ^58941_6427_7545$ (The ASN's here may not be exactly what is in use, you will need to check your received prefixes) On 2018-01-12 09:46, John Alexander wrote: With this, does anyone know of a way of keeping HE routes, but excluding a specific one, namely TPG 7545 which is a direct customer of HE. Traffic from them goes from Syd -> LA -> Syd -> he peering -> me. I'd prefer to just make them stay at home so to speak instead of going around the world. We don't peer at Pipe which would be the only other place to connect to tpg. John On 01/11/2018 05:55 PM, Nathan Le Nevez wrote: I assume it was Hurricane Electric...IPv6 routes are now at 21843 too Nathan -----Original Message----- From: AusNOG [mailto:[email protected]] On Behalf Of Paul Holmanskikh Sent: Thursday, 11 January 2018 5:00 PM To: [email protected]<mailto:[email protected]> Subject: [AusNOG] Megaport IX Sydney - Sudden grows in number of prefixes G'day, Number of prefixes we are receiving from Megaport IX in Sydeney suddenly jumped to 40493. At lest 100% grow. Any ideas what happened. as_path count 36351 945 4739 909 9443 658 _______________________________________________ AusNOG mailing list [email protected]<mailto:[email protected]> http://lists.ausnog.net/mailman/listinfo/ausnog _______________________________________________ AusNOG mailing list [email protected]<mailto:[email protected]> http://lists.ausnog.net/mailman/listinfo/ausnog _______________________________________________ AusNOG mailing list [email protected]<mailto:[email protected]> http://lists.ausnog.net/mailman/listinfo/ausnog _______________________________________________ AusNOG mailing list [email protected]<mailto:[email protected]> http://lists.ausnog.net/mailman/listinfo/ausnog
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